Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4364746 | Abrasive material | Diethelm Bitzer, Jakob Ackermann | 1982-12-21 |
| 4317660 | Manufacturing of flexible abrasives | Jakob Ackermann | 1982-03-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4364746 | Abrasive material | Diethelm Bitzer, Jakob Ackermann | 1982-12-21 |
| 4317660 | Manufacturing of flexible abrasives | Jakob Ackermann | 1982-03-02 |